BUREAU OF SCIENCE PUBLICATION No. 18 

 VOLUME 2, FxlSCICLE 5 



EXPLANATORY NOTE 



The present enumeration is an attempt to summarize in con- 

 venient form for consultation our present knowledge of Phil- 

 ippine flowering plants, and represents a part of the knowledge 

 accumulated by the author during a course of about twenty 

 years' study of the problem. In the work an attempt has been 

 made to account for all binomials accredited to the Philippine 

 flora; to adjust the synonymy when necessary; to include all 

 important references to the Philippine botanical literature and 

 essential references to extra-Philippine literature; to give the 

 habitat, altitudinal range, and Philippine and extra-Philippine 

 distribution of each species ; to cite illustrative specimens where 

 expedient or necessary ; and to record all available local names 

 for each species. 



It is proposed to issue the present work in fascicles, utilizing 

 one volume for the gymnosperms and the monocotyledons and 

 two volumes for the dicotyledons. It is planned to publish full 

 introductory and explanatory matter in a general introduction 

 to be prefixed to Volume 1 when the entire enumeration is com- 

 pleted. 



Elmer D. Merrill. 



Manila, P. I., August 25, 1921. 



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